By ida w



H. MUELLER. 'DECD.

l. \v. MUELLER. ADMINISTRATRIX- WELDING.

v APP -ICATION FILED AHLZ, 9 l L23A5 Patented Dec. 2,1919.

33 24 i I i l HENRY MUELLER, DECEASED, LATE OF CHICAGO, ILLINOIS, BY IDAW. MUELLER, ADMINISTBATRIX, OF CHICAGO, ILLINOIS, ASSIGNOR TO GEORGE H.FORSYTH,

or enroaso, ILLInoIs.

memes.

To all whom it ma concern:

Be it known that HENRY MUELLER, late a subject of the EmperoroflGermany, and a resident of Chicago, in the county of Cook and Stateof Illinois, did invent certain new and useful Improvements .in Welding,

sheet metal halves of various objects such for instance as sheet steelwheels for vehicles and it is in connection with such use that'theinvention is herein illustrated and described. In the accompanyingdrawings Figure 1 is a fragmentary top plan view showing the inventionas applied to the hub, rim and spokes of a sheet metal wheel;

Fig. 2.is a similar view of a modified form of burner;

Fig. 3 is a vertical section on the line 33 of Fig. 2; and

Fig. 4: is a fragmentary vertical section on an enlarged scaleillustrating the distribution of the gaseous mixture, applicabletoeither form of burner shown in Figs. 1 and 2. I

In the drawings the reference numerals 11 and 11*- represent cooperatinghub portions of the upper and lower halves of a sheet metal wheel, 12and 12 the spoke portions of the upper and lower halves, and 13 and 13the rim portions of the upper and lower halves, the said upper and lowerhalves of the wheel being held in pressure contact between clamp members14 and 14 and 15 and 15,, hearing respectively upon the hub and rimportions.

Within each of the generallytriangular spaces 16 embraced by the hub,rim and adj acent spokesis disposed a burner indicated in Fig. 1 by thereference numeral 17,

which is of the same general shape as the said space, said burner havingnozzles or burner tips 18 projecting toward and extending to pointssubstantially equidistant from the line to be Welded and formed of theabutting edges of the hub, spoke and Specification of Letters Patent.

WELDING.

Application filed April 2, 1915. Serial No. 18,744.

rim portions of the upper and lower halvesof the wheel whereby the jetsof flame from the burner will be applied simultaneously and uniformlythroughout the entire extent of the line of surfaces to be-weldedtogether.

. In Fig.2 the conditions are substantially the same with the exceptionthat instead of being provided with nozzles or burner tips the burner 19furnishes a continuous jet adapted to present a continuous sheet offlame to the line of surfaces to be welded from which it is likewisearranged substantially equidistant throughout.

Having reference more particularly to Fig. 1, the gaseous mixture, whichmay be. oxygen and acetylene, oxygen and hydroeach of the burners from acentral mixing vessel 20 to the interior of which the two gases areintroduced through ports 21 and 22 controlled jointly by a valve 23, themixed gases being conducted through pipes 24: leading one to each burnerat the point 25.

. gen, or other suitable mixture, is supplled to According to theconstruction illustrated in Fig. 2, two centrally arranged feed headers26' and 27 are supplied respectively with gas through the feed pipes 28and 29, and the gas is conducted from each of the feed headers 26and--27 by means of pipes 30 and 31 to the burner19 which, as--clearlyshown in Fig. 3, comprises a cover plate 32 and a body portion 33, thelatter providing a central chamber 34 for the gas conducted by the pipe30 and an-annular chamber 35 for the gas conducted by the pipe 31. Here,it will be observed, both kinds of gas are independently supplied to theburner and are allowed to mix first when they leave the burner throughthe jet passage 36.

In Fig. 4 is shown another form of mixing burner, one of the gases beingsupplied by the pipe 37 toan annular chamber 38 while the other gas issupplied by the pipe 39 to the annular chamber 40. From the chambers 38and 40 the gases are conducted through the channels 41 and 42 to theannular mixing chamber 43 whence they are supplied eitherto burner tipsHer through a continuousjet passage, 9. pilot burner {i5 being suppliedwith gas from a chamber This manner of mixing is applicable alike Acharacteristic feature of the invention is the employment of a burneradapted to direct a substantially continuous sheet of flamesimultaneously against the abutting edges of surfaces to be weldedthroughout their extent as distinguished from the ap-' plication of a.welding flame progressively along the meeting line of surfaces to bewelded. Where extended areas are to be united and particularly inthecase of surfaces divided into a number of isolated portions as typifiedby metal wheel construction it has been found to be exceedinglydiflicult to eflec't a uniform junction of parts, for the reason that inthe welding operation those portions being welded yield toward eachother under the welding heat and the pressure of the clamping members,while those portions which have not yet been subjected to a welding heatresist the clamping action and maintain their original position thusleading to a deformation with resultant lack of symmetry in thecompleted article. According to the present invention the meeting edgesof the hub, rim and spoke portions throughout the circumference of thewheel, being held under pressure contact with each other, aresimultaneously heated by the admission of the gas to the several burnersunder the control of the central valve 23 whereby the meeting edgesareheated and the welding takes place simultaneously throu hout theextent of the wheel the parts yielding and uniting uniformly.

It is to be understood that as used in this specification and in theclaims the terms abutting, contact, meeting, and the like as applied tothe edges of the sheets to be welded, are relative terms and are not tobe interpreted as limiting to a direct contact as distinguished from anindirect contact as where a welding strip or wire is inserted betweenthe edges and the two held together thereon.

Claims:

1. The combination with means. to hold in contact an extended line ofabutting surfaces to be welded, of a burner for welding arranged todirect its flame simultaneously upon the edges to be, welded throughouttheirlength, and ,means to supply fuel to the burner. l

2. The combination with means to press together an extended line ofabutting surfaces to be welded, of a burner for welding arranged withits jet, directed toward and substantially equidistant from the surfacesto'be welded throughout their length, and meansto supply gaseous fuel tothe burner.

3. The comblnation with'means to press 1 together an inclosed line ofabutting sur-' I faces to be welded, of a burner for welding -arrangedwithinthe inclosed space with its "jtidirected toward and substantiallyequidistant from the abutting surfaces throughout their extent, andmeans to supply gaseous fuel to the burner.

4:. The combination with means to press together the two halves of asheet metal body superposed with their edges abutting, of a burner forwelding having its jet directed toward and substantially equidistantfrom theabutting edges, and means to sup ply a gaseous fuel to theburner.

5. The combination with means to mainmm in pressure contact the twohalves of a sheet metal wheel comprising hub and spoke portionssuperposed with their edges abutting, of a burner disposed Within thespace embraced by the hub and a pair of adjacent spokes, the burnerbeing of a shape approximating that of the said space and having its jetdirected toward and substantially equidistant from the abutting edges,and means to supply a gaseous fuel to the burner.

' 6. The combination with means to hold the two halves of a sheet metalwheel comprisin hub and spoke portions superposed with t eir edgesabutting, of a burner disby the hub and adjacent spokes, each burnerhaving its jetdirected toward and substantially equidistant from theadjacent abutting edges, means to supply gaseous fuel to the burners,and means to control said supply to the several burners in unison.

7. The combination with means to maintain in pressure contact the twohalves of a sheet metal wheel comprising hub, spoke and rim portionssuperposed with their edges abutting in the median plane of the wheel,of a burner disposed within each of the spaces inclosed between the rim,hub and adjacent spokes, the burner being of a shape approximating theinclosed space and having its jet directed toward and'substantiallyequidistant from the adjacent abutting edges, means to supply a gaseousfuel mixture toeach burner, and means to control'in unison the supply offuel to all of the burners.

8. The method of welding the superimposed halves of sheet metal wheelsand like bodies having isolated portions to be welded which consists inapplying a welding flame simultaneously to the abutting edges of thehalves of the hub and the several spoke and rim portions.

9. Themethod of welding abutting surfaces of extended length whichconsists in applying a welding flame thereto simultaneously throughoutthe extent of the portionto be welded and at the same time exertingpressure toward the line of abutment to bring said portions into moreintimate contact.

posed within each of the spaces embraced I mamas tions of a bodycomposed of a plurality of signed my name in the presence of twosubmetal parts, of a welding burner arranged scribing witnesses.

to direct a flame simultaneously upon the IDA W.'MUELLER meeting edgesof such isolated portions Administratriw for 'He'm'y Mueliei'. 5 andthroughout the length 0i said edges, v Witnesses: a V

' and means to supply fuel to the burner. t LEWISWT. GREIST,

In witness whereof I have hereunto Bmmo MUELLER.

